Something refined brought back from Ragusa (5)
I believe the answer is:
sugar
'something refined' is the definition.
I can't tell whether this defines the answer.
'back from ragusa' is the wordplay.
'SUGAR' is hidden backwards within the letters.
However, I am uncertain how the hidden word is indicated.
'brought' is the link.
Can you help me to learn more?
(Other definitions for sugar that I've seen before include "Argus (anag.)" , "Term of affection" , "Sweetening agent" , "Sweeten" , "for such a daddy" .)